This is the reply i got from Canon The purpose of using Log is to obtain the widest dynamic range as much as possible and as much information recorded as possible. In some cases banding may be recorded in low light areas which is your case. This is n...
Mine is so bad too, ive only noticed it when I started using CLOG 3 (iso 800)Heres what I found from Canons manual, I'm waiting for Canon to get back to me.
